You can go to --> ************************************* to post your question.
If you can read Thai , you should try --> ************************************************* , This forum say about modifying Firmware.

Actuallu I am not sure you can modify US os to Mal/sing os and can display Thai jcv.
Modifying is very complicated and your device could become dead unit !!

Hello aekhong,

Would you kindly PM me the links you have posted earlier but edited by admin. Sorry my posts are less 5, so I couldn't PM you directly.
Many thanks

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Thanks, another thing is do I just copy the .img file into the garmin and it will works? Sorry I haven't buy the GPS yet and never use one before so would like to know do I need any other file other then the one that I downloaded from this thread. If possible can help to give a step by step on how to apply the map in a Garmin 255w(I am planning on buying this model from Singapore and bring to Thailand for use) Appreciate your help.

I noticed that acquiring satellite in Bangkok takes longer time than other cuntries I have been to. Has anyone noticed similar case?. My device is Nuvi 765T, using Thailand Street Map 10.1 English (Unfortunately still couldn't figure out a way to have JCV & LANE ASSIST enabled).

I noticed that acquiring satellite in Bangkok takes longer time than other cuntries I have been to. Has anyone noticed similar case?. My device is Nuvi 765T, using Thailand Street Map 10.1 English (Unfortunately still couldn't figure out a way to have JCV & LANE ASSIST enabled).

on my garmin Oregon 200, I get the satellite immediately, just a few seconds, never recognized any delay. Don't know how it is between very tall buildings but in my room on the topfloor inside the house it is in seconds.

Help with loading Thailand (EN) V10 map onto Garmin 1490T GPS.

unlocked english img rename gmapsupp.img and copy in a garmin directory

Hi - I've just joined this forum and am still trying to find my way around so please forgive me if this request is in the wrong place or has been answered before!

I've got a Garmin Nuvi 1490T device and have successfully downloaded unlocked versions of both the V10 and V10.1 (EN) Thailand street maps with the help of this excellent website but have been quite unable to get my Garmin to recognise the files.
I've tried renaming them as suggested and have copied them onto a 4Gb MicroSD card in a "Garmin" folder but the unit does not recognise the file.
The only message I've had was "unable to unlock maps" when I named the file "gmapsupp" without the quotes and with no file extension.

Can someone please advise me? - I feel that I'm probably making some very basic error but I can't figure out what it is!

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